Define perpendicular lines

When two lines meet each other at right angle then those lines are referred to as perpendicular lines. When a line intersects another line at 90º then we say that the line is perpendicular to it. The symbol used for the perpendicular is ‘⊥’. For example, if line L₁ meets line L₂ at90º then we can say thatL₁and L₂are perpendicular to each other and can be represented as L₁ ⊥ L₂.